9. Dammmn, it's not even calcite. It's dolomite-ankerite (Ca,Mg(CO3)2). See, Ca-Mg are bright. Fe is not that bright. Now, we know, the red-brownish veinlet is siderite (FeCO3), and the fibrous is not calcite. It's dolomite-ankerite...

This finding is of significance as earlier reports of Phanerozoic radiaxial fibrous carbonates are exclusively of calcite mineralogy. Dolomite concretions described here formed beneath marine transgressive intervals within palustrine coal seams. This is of significance as seawater was arguably the main source of Mg2 + ions for dolomite formation. (literature somewhere )

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12. Yes, correct... okay, don't forget, that most of sample were altered into dolomite. So, probably it is dolomitization (dolomitization: alteration of limestone into dolomite)

13. Woooow, I spend almost an hour only to describe one spot for one thin section............

14. Wooooooooow, I still have another samples to identify.....................

limestone does not always classified as calcite. Other form can be dolomite, ankerite, siderite, magnesite, or rhodochrosite. See ternary diagram below)

explanation point 9:

the brighter the phase, means, the higher it's density, and the more abundant it's element. In this picture, only, Ca-Mg-O and minor Fe were detected. So, we can eliminate "rhodocrosite (MnCO3) and calcite (CaCO3). Now, see thin veinlet of Fe in the middle of fibrous. It is dark. It means, the thin veinlet should contain more Fe, and now, we understand, it is siderite)